Anchors for marine use

ABSTRACT

THE ANCHOR INCORPORATES A SHANK AND A HEAD PIVOTED TO THE SHANK. THE HEAD CONSISTS OF TWO SEPARATE END PORTIONS CONNECTED BY A CURVED INTERMEDIATE PORTION WHICH IS PIVOTED TO THE SHANK AT ONE END. THE PORTION OF THE HEAD BETWEEN THE CURVED PORTION AND THE OTHER END CARRIES TWO SIDEWARDLY EXTENDING FLUKES. THE FLUKES ARE FORMED OF A PLATE BENT AND AXIS OF SYMMETRY AND FITTED TO THE HEAD PORTION.

Feb. 13, 1973 K. L. WRIGHT 3,716,012

ANCHORS FOR MARINE USE Filed June 8, 1970 3 Sheets-Sheet 1 FIG. I

Feb. 13, 1973 K. L. WRIGHT 3,716,012

ANCHORS FOR MARINE USE Filed June 8, 1970 3 Sheets-Shem?- 2 Feb. 13, 1973 K. WRIGHT 3,716,012

ANCHORS FOR MARINE USE Filed June 8, 1970 3 Sheets-Sheet 3 FIG.4

United States Patent 3,716,012 ANCHORS FOR MARINE USE Kenneth L. Wright, Coatbridge, Scotland, assignor to The Security Patent Anchor Company Limited, Whifflet, Coatbridge, Scotland Filed June 8, 1970, Ser. No. 44,021 Claims priority, application Great Britain, June 20, 1969, 31,310/ 69 Int. Cl. B63b 21/34 US. Cl. 114-207 9 Claims ABSTRACT OF THE DISCLOSURE This invention relates to anchors for marine use.

An anchor according to the invention incorporates a shank and, pivoted to one end of the shank a head c nsisting of two straight end portions connected by a curved intermediate portion the curvature of which is such that the end portions lie at an acute angle to one another with their centre lines all in the same plane, the head being pivotally attached to the shank at one end, the axis of the pivotal connection lying in the same plane as the centre line of the shank and also in the same plane as the centre lines of the portions of the head, and the portion of the head between the curved portions and the other end carrying two sidewardly extending flukes inclined in directions away from one another and from the shank.

The end portion of the head carrying the flukes is preferably pointed at its outer end.

The portion of the head carrying the flukes may be triangular in cross section with the vertex of the triangle pointing towards the shank, the flukes being formed from a plate bent to the same angle as that formed between the sides defining the said vertex and being fitted over the head portion to embrace the head portion.

The sides of the head portion forming the vertex may be recessed so that the plate, when fitted to the head portion, is flush with the adjoining portions of the sides of the head portion.

There may be provided between the ends of the flukes a strut fastened between the flukes within the recess formed between the flukes. The strut may consist of a tube welded at its ends to the flukes.

Each fluke may be substantially triangular with one lobe extending backwardly beyond the intermediate portion of the bar.

The plate which is bent to form the flukes may be approximately heart-shaped, the line of bend being along the line of symmetry of the heart.

The end portion pivoted to the shank may be formed with a spigot presenting two transverse trunnions, the two trunnions being co-axial, with their common axis lying on the same plane as that containing the centre lines of the head portions. In this construction the end of the shank is bifurcated to embrace the spigot, the limbs of the bifurcation being formed with apertures for reception of the trunnions. At least one of the limbs of the bifurcation may be a portion separate from the shank and welded thereto after the trunnions have been engaged with the aperture.

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The shank may be curved towards the head near the end pivoted to the head.

A practical embodiment of the invention is illustrated in the accompanying drawings in which FIG. 1 is a side elevation of the anchor head, FIG. 2 is a plan view looking on the anchor head, FIG. 3 is a section through the line 33 in FIG. 1, FIG. 4 is a section through the i 4-4 in FIG. 1 and FIG. 5 is a section through the line 5--5 in FIG. 1.

In the drawings, 1 denotes a shank and 2 denotes a reflex head consisting of straight portions 3 and 4 connected to one another by a curved intermediate portion 5. The end portion 3 is formed with a spigot 6 presenting two transverse co-axial trunnions 7 with their common axis lying in the same plane as that containing the centre lines of the portions 3, 4 and 5. The shank 1 is bifurcated, the limbs of the bifurcation embracing the spigot 6 and being formed with apertures engaging the trunnions 7. The head portion 4 is triangular in cross section, the triangular shape being so orientated that the vertex of the triangle points towards the shank 1. The head portion 4 is furnished with two flukes 8 formed from a plate of substantially heart shape bent about the line of symmetry of the heart to the same angle as that formed between the sides defining the vertex of the triangular-section head portion 4 and being fitted over and welded to the head portion 4 in a recess 4A provided for reception of the bent plate forming the flukes 8. This construction can be seen clearly in FIG. 3. 9 denotes a strut welded between the lobes 8A of the flukes 8 to provide added rigidity to the flukes.

What is claimed is:

1. An anchor incorporating a shank and, pivoted to one end of the shank a head consisting of two straight end portions connected by a curved intermediate portion, the curvature of which is such that the end portions lie at an acute angle to one another with their center lines all in the same plane, the shank being pivotally attached to one of said end portions, the axis of the pivotal connection lying in the same plane as the center line of the shank and also in the same plane as the center lines of the portions of the head, and two sidewardly extending mutually inclined flukes formed from a single plate bent along a line of symmetry to the desired angle of mutual inclination of the flukes fitted over the other end portion to embrace the said other end portion, the end portion of the head embraced by the plate forming, the flukes being recessed between its ends so that the plate, when fitted to the said end portion, is flush with the adjoining portions of the surface of the head at opposite ends of the plate, a portion of the head thus projecting beyond the front end of the plate.

2. An anchor as claimed in claim 1 in which the portion of the head projecting beyond the front end of the plate is pointed at its outer end.

3. An anchor as claimed in claim 1 in which the plate bent to form the flukes is approximately heart shaped, the line of bend being along the line of symmetry of the heart.

4. An anchor as claimed in claim 1 in which there is provided between the ends of the flukes a strut fastened between the flukes within the recess formed between the flukes.

5. An anchor as claimed in claim 1 in which each fluke is substantially triangular with one lobe extending backwardly beyond the said intermediate portion of the head.

6. An anchor as claimed in claim 1 in which the end of the head pivoted to the shank is formed with a spigot presenting two transverse trunnions, the two trunnions being co-axial, with their common axis lying on the same plane as that containing the centre lines of the portions of the head.

7. An anchor as claimed in claim 6 in which the end of the shank is bifurcated to embrace the spigot, the limbs of the bifuration being formed with apertures for reception of the trunnions.

8. An anchor as claimed in claim 7 in which at least one of the limbs of the bifurcation is a portion separate from the shank and Welded thereto after the trunnions have been engaged with the apertures.

9. An anchor as claimed in claim 1 in which the shank is curved towards the head near the end pivoted to the head.

References Cited UNITED STATES PATENTS 1,974,933 9/1934 Taylor 114-208 R 2,402,202 6/1946 Norton 114-208 R FOREIGN PATENTS 694,976 7/1953 Great Britain 114207 1,100,518 1/1968 Great Britain l14208 R 1,466,433 12/1966 France 114208 R MILTON BUCHLER, Primary Examiner G. L. BAREFOOT, Assistant Examiner 

